Rice Lake 720i User manual

PN 103121 Rev C
Programmable HMI Indicator/Controller
Version 2.01
720i Batching Version 1.01
Installation Manual
Disponible
en Español
Visite ricelake.com/spanish
para ver todos los materiales
RLWS disponibles en Español

Contents
About This Manual ................................................................................................................................... 1
Safety ........................................................................................................................................... 1
1.0 Introduction.................................................................................................................................. 2
1.1 Operating Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Indicator Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Softkey Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 System Configurations and Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5 Summary of Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.0 Installation ................................................................................................................................... 6
2.1 Unpacking and Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Enclosure Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3.1 Cable Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3.2 Load Cells. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3.3 Serial Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3.4 Digital I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3.5 Detached Display Module (DDM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Installing Option Cards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5 Slot Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.6 Enclosure Reassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.7 CPU Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.8 Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.9 Replacement Parts and Assembly Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.9.1 Universal Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.9.2 Panel Mount Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.9.3 Panel Mount Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.0 Configuration ............................................................................................................................. 18
3.1 Configuration Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.1.1 Revolution Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.1.2 Serial Command Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.1.3 Front Panel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.1.4 Multi-Range and Multi-Interval Scales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.2 Menu Structures and Parameter Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.2.1 SCALES Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.2.2 SERIAL Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.2.3 FEATURE Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.2.4 PFORMT Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
3.2.5 DIG I/O Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.2.6 ALGOUT Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
3.2.7 FLDBUS Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
3.2.8 VERS Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
4.0 Calibration ................................................................................................................................. 47
4.1 Gravity Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
4.2 Front Panel Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
4.3 Serial Command Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.4 Revolution Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Technical training seminars are available through Rice Lake Weighing Systems.
Course descriptions and dates can be viewed at www.ricelake.com/training
or obtained by calling 715-234-9171 and asking for the training department.
© Rice Lake Weighing Systems. All rights reserved. Printed in the United States of America.
Specifications subject to change without notice.
Rice Lake Weighing Systems is an ISO 9001 registered company.
Version 2.01 720i Batching Version 1.01
August 21 , 2015

ii 720i Installation Manual
5.0 Using Revolution ........................................................................................................................ 50
5.1 Connecting to the Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.2 Installing Software Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.0 Print Formatting ......................................................................................................................... 52
6.1 Print Formatting Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.2 Default Print Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6.3 Customizing Print Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6.3.1 Using Revolution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6.3.2 Using the Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
6.3.3 Using Serial Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.0 Truck Modes .............................................................................................................................. 58
7.1 Using the Truck Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.2 Using the Truck Regs Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.3 Weigh-In Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.4 Weigh-Out Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.5 Single-Transaction Tare Weights and IDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.6 Using the Advance Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.6.1 Advance Mode Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
8.0 Setpoints .................................................................................................................................... 65
8.1 Batch and Continuous Setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
8.2 Setpoint Menu Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
8.3 Batch Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
9.0 Using ProAction PCEE................................................................................................................ 81
10.0 Serial Commands ...................................................................................................................... 86
10.1 The Serial Command Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
10.1.1 Key Press Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
10.1.2 Reporting Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
10.1.3 Clear and Reset Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
10.1.4 Parameter Setting Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
10.1.5 Normal Mode Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
10.1.6 Batching Control Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
10.1.7 Database Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
10.1.8 Advance Mode EDP Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
11.0 Appendix .................................................................................................................................... 98
11.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
11.1.1 Option Card Diagnostic Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
11.1.2 Using the HARDWARE Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
11.1.3 Diagnostic Boot Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
11.1.4 Onboard Diagnostic LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
11.1.5 Using the XE Serial Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
11.2 Regulatory Mode Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
11.3 Serial Scale Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
11.4 Local/Remote Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
11.5 Custom Stream Formatting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
11.6 Data Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
11.7 Digital Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
11.8 Conversion Factors for Secondary Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
11.9 PS/2 Keyboard Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
11.10 Audit Trail Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
11.11 Display Module Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
11.12 Alibi Tracking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Rice Lake continually offers web-based video training on a growing selection
of product-related topics at no cost. Visit www.ricelake.com/webinars.

iii
11.13 Dimension Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
11.14 Printed Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
11.15 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

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Safety 1
About This Manual
This manual is intended for use by service technicians responsible for installing and servicing 720i™ digital weight
indicators. This manual applies to Version 2.00 of the 720i indicator software and Version 1.01 of the 720i Batching
indicator software.
Configuration and calibration of the indicator can be accomplished using the Revolution III® configuration utility,
serial commands, or the indicator front panel keys. See Section 3.1 on page 18 for information about configuration
methods.
Authorized distributors and their employees can view or download this manual from the Rice Lake
Weighing Systems distributor site at www.ricelake.com.
The Operator Card included with this manual provides basic operating instructions for users of the 720i. Please
leave the Operator Card with the indicator when installation and configuration are complete.
Safety
Safety Signals
Safety Symbol Definitions
Indicates a potentially hazardous situation that, if not avoided, could result in serious injury or death, and
includes hazards that are exposed when guards are removed.
Indicates a potentially hazardous situation that, if not avoided may result in minor or moderate injury.
Indicates information about procedures that, if not observed, could result in damage to equipment or
corruption to and loss of data.
Safety Precautions
Do not operate or work on this equipment unless you have read and understand the instructions and
warnings in this Manual. Failure to follow the instructions or heed the warnings could result in injury or
death. Contact any Rice Lake Weighing Systems dealer for replacement manuals. Proper care is your
responsibility.
Some procedures described in this manual require work inside the indicator enclosure. These
procedures are to be performed by qualified service personnel only.
General Safety
Failure to heed may result in serious injury or death.
DO NOT allow minors (children) or inexperienced persons to operate this unit.
DO NOT operate without all shields and guards in place.
DO NOT step on the unit.
DO NOT jump up and down on the scale.
DO NOT use for purposes other than weight taking.
DO NOT place fingers into slots or possible pinch points.
DO NOT use any load-bearing component that is worn beyond 5% of the original dimension.
DO NOT use this product if any of the components are cracked.
DO NOT exceed the rated load limit of the unit.
DO NOT make alterations or modifications to the unit.
DO NOT remove or obscure warning labels.
DO NOT use near water.
Before opening the unit, ensure the power cord is disconnected from the outlet.
Keep hands, feet and loose clothing away from moving parts.
WARNING
CAUTION
Important
WARNING
WARNING

2720i Installation Manual
1.0 Introduction
The 720i is a single-channel, programmable digital
weight indicator/controller. The configuration can be
performed using the front panel, with an attached 
PS/2®1-type keyboard, or using the Revolution III
utility.
The 720i can be loaded with either PCE software or
720i batching software. Refer to Section 8.0 on page 65
or Section 9.0 on page 81 for further information on
each of these software choices.
Onboard Features
Features of the basic 720i include:
• Support for a single A/D or serial scale input.
• Eight digital I/O channels on main board, each
configurable as either input or output.
• Two serial ports on main board support duplex
RS-232 up to 115200 bps. Port 2 supports RS-232
with hardware handshaking; Port 4 supports
RS-232 and 20mA communications.
• Available in 115 VAC and 230 VAC North
American and European versions.
• Configurable print formats can be defined for up to
1000 characters each using serial commands or
Revolution III. These formats are used to print
gross or net weights, truck in/out weights,
accumulator weights, alert messages, and header
information. Additional print formats can be
created using twenty auxiliary print formats.
• Seven truck modes to store and recall weights for
gross, tare, and net printing. The truck register
contains fields for ID number, weight, and the
transaction time and date. Weights can be stored
permanently or erased at the end of the transaction.
The 720i is NTEP-certified for Classes III and III L at
10,000 divisions. See Section 11.15 on page 113 for
more information about additional certifications and
approvals.
Option Cards
The CPU board provides one slot for installing other
option cards. Available option cards include:
• Analog output card for 0–10 VDC or 0–20 mA
tracking of gross or net weight values.
• Dual-channel serial expansion card provides one
RS-485 port or two ports for either RS-232 or
20mA communications at up to 19200 bps.
• 24-channel digital I/O expansion card.
• Ethernet option card
• Bus interface cards for EtherNet/IP™2,
DeviceNet™3, Allen-Bradley Remote I/O4,
Profibus® DP networks5 and ControlNet™6.
Part numbers of available option cards are listed in
Section 1.4 on page 5.
Front Panel
The 720i universal model front panel, shown in
Figure 1-1, consists of a 22-button keypad with an
LCD display. The keys are grouped as four
configurable softkeys, four scale function/navigation
keys, MENU and PRINT/Enter keys, and numeric entry
keys. The panel mount front panel is shown in
Figure 1-2.
LCD display contrast can be adjusted selecting the
Contrast Adj function from the system menu.
Figure 1-1. 720i Universal Front Panel
Figure 1-2. 720i Panel Mount Front Panel
Enclosures
The 720i is available in universal (tilt-stand) and panel
mount enclosures. Stainless steel enclosures are rated
for NEMA Type 4X/IP66. This manual provides
assembly drawings and replacement parts lists for the
universal model; supplemental documentation provides
information specific to the panel mount model (See
Section 1.4 on page 5).
1. PS/2® is a registered trademark of IBM Corporation.
2. EtherNet/IP™ is a trademark of ControlNet International,
Ltd., under license by the Open DeviceNet Vendor Associa-
tion.
3. DeviceNet™ is a trademark of the Open DeviceNet Vendor
Association.
4. Allen-Bradley®, PLC®, and SLC™ are trademarks of
Allen-Bradley Company, Inc., a Rockwell International com-
pany.
5. Profibus® is a registered trademark of Profibus Interna-
tional.
6. ControlNet is a trademark of ControlNet International, Ltd.,
under license by the Open DeviceNet Vendor Association.

Introduction 3
Support Applications
In addition to Revolution III, the 720i is supported by
two Windows-based applications that extend its
capabilities for batch control and database
management. ProAction PCEE, or Process Control
Engine Editor, provides functions similar to setpoint
configuration for 720i-based batch control. ProAction
DBE, the database editor, is a tool for creating, editing,
and managing databases in the 720i. Both applications
are included on the 720i Toolkit CD.
1.1 Operating Modes
The 720i has two modes of operation:
Setup mode
Most of the procedures described in this manual
require the indicator to be in setup mode, including
configuration and calibration.
To enter setup mode, press the MENU key on the
front panel, select Configuration, then press Enter.
The indicator display changes to show scale
configuration menus.
Jumper J9 (see Figure 2-3 on page 9) must be
installed to enable access to setup mode.
When configuration is complete, remove the
jumper (place the jumper on a single pin of J9)
to disable access to the configuration menus.
Normal mode
Normal mode is the weighing mode of the
indicator. The indicator displays gross, net, or tare
weights as required, using the secondary display to
indicate scale status and the type of weight value
displayed. Once configuration is complete, remove
jumper J9 and affix a legal seal to the fillister-head
screws on the indicator enclosure.
1.2 Indicator Operations
Basic 720i operations are summarized below:
Display Menu
Press the MENU key to show the system menu, then use
the Up or Down navigation keys to select an item from
the list. The menu provides access to audit trail
information, configuration, test operations, and display
contrast adjustment.
Toggle Gross/Net Mode
Press the GROSS/NET key to switch the display mode
from gross to net, or from net to gross. If a tare value
has been entered or acquired, the net value is the gross
weight minus the tare. If no tare has been entered or
acquired, the display remains in gross mode.
Gross mode is indicated by the letter G (gross) or, in
OIML mode, B (brutto); net mode is indicated by the
letter N.
Toggle Units
Press the UNITS key to switch between primary,
secondary, and tertiary units.
Zero Scale
1. In gross mode, remove all weight from the
scale and wait for the standstill annunciator
().
2. Press the ZERO key. The center of zero ( )
annunciator lights to indicate the scale is
zeroed.
Acquire Tare
1. Place container on scale and wait for the
standstill annunciator ( ).
2. Press the TARE key to acquire the tare weight
of the container.
3. Display shifts to net weight and shows the
letter N on the display.
Enter Tare Value
For the universal model, use the numeric keypad to key
in the tare value, then press the Tare softkey or press
and hold the front panel TAR E key to enter the tare.
For the panel mount model, do the following:
1. Press and hold the GROSS/NET key for about
three seconds. When released, a zero appears.
2. Use the Up and Down navigation keys to adjust
the value (0-9 and a decimal point) and the
Right and Left navigation keys to select the
digit.
3. Press the Tare softkey or press and hold the
front panel TAR E key for about three seconds,
then release to enter the tare.
Remove Stored Tare Value
1. Remove all weight from the scale and wait for
the standstill annunciator ( ).
2. Press the TARE key (or, in OIML mode, the
ZERO key). Display shifts to gross weight and
shows the word Gross.
Print Ticket
1. Wait for the standstill annunciator ( ).
2. Press the PRINT key to send data to the serial
port.
Select Auxiliary Print Format
Any of the auxiliary print formats (1–20) can be
selected for printed output while in weighing mode.
Not available in Advance Truck Mode.
For the universal model, use the numeric keypad to key
in the print format value, then press the Print softkey or
the front panel PRINT key to print using the selected
auxiliary format.
For the panel mount model, do the following:
1. Press and hold the GROSS/NET key for about
three seconds. When released, a zero appears.
2. Use the Up and Down navigation keys to adjust
the value (0-9 and a decimal point) and the
Note
0
Note

4720i Installation Manual
Right and Left navigation keys to select the
digit.
3. Press the Print softkey or the front panel PRINT
key to print using the selected auxiliary format.
Accumulator Functions
The accumulator must be enabled before use. Once
enabled, weight (net weight if a tare is in the system) is
accumulated whenever a print operation is performed
using the PRINT key, digital input, or serial command.
The scale must return to zero (net zero if a tare is in the
system) before the next accumulation.
The Display Accum softkey can be configured to display
the current accumulator value. Printing while the
accumulator is displayed uses the ACCFMT print
format (see Section 6.0 on page 52).
Press the CLEAR key twice to clear the accumulator.
With the panel mount version of the 720i, you
need to use CLR Accumulator DigIn Function
to clear the indicator.
1.3 Softkey Operations
Softkeys provide additional operator functions for
specific applications. Softkey assignments are listed on
the tabs shown at the bottom of the LCD display;
softkey functions are activated by pressing the arrow
keys below the softkey tabs (see Figures 1-1 and 1-2 on
page 2).
For example, to set up a TimeDate softkey using serial
commands, do the following:
1. Place indicator in setup mode.
2. Send the following serial command:
SK#s=TimeDate
where s is the softkey position.
3. Press SaveExit (or send the KSAVEEXIT serial
command). The new softkey will appear in the
position specified by s.
4. Press the TimeDate softkey. Use the Up/Down
navigation keys to adjust the time and date
value; use the Left/Right keys to move between
fields. Time and date fields are presented in the
following order:
HOUR>MIN>[AM/PM]>MONTH>DAY>YEAR
When done, press Enter to return to weighing
mode.
The particular set of softkeys shown on the display can
be set using serial commands or Revolution III.
Note
Softkey Description
None Not Configured, no softkeys will appear
after a none key.
<blank> Empty Key, allows for a space/blank
between other softkeys.
Time/Date Displays current time and date; allows
time and date change.
Display Tare Displays tare value for the current scale
Display Accum Displays accumulator value, if enabled, for
the current scale.
Display ROC Displays rate-of-change value, if enabled,
for the current scale.
***Weigh In Allows truck ID entry; generates weigh-in
ticket for truck weighing applications.
***Weigh Out Allows truck ID entry; generates weigh-out
ticket for truck weighing applications.
***Truck Regs Displays truck register; allows deletion of
individual or all entries. Truck register can
be printed by pressing the PRINT key
while the truck register is displayed.
Alibi Allows previous print transactions to be
recalled and reprinted.
SKUD 1-10 User-programmable keys; defined by
PCEE.
**Setpoint Displays a menu of configured setpoints;
allows display and change of some
setpoint parameters.
**Batch Start Starts a configured batch.
**Batch Stop Stops a running batch and turns off all
associated digital outputs. Requires a
batch start to resume processing.
**Batch Pause Pauses a running batch. (Same as stop,
but digital outputs, if on, are not turned
off.)
**Batch Reset Stops a batch and resets it to the first
batch step.
*Weigh Start the Weigh-In and Weigh-Out
Procedure.
*Reports Select which report to print. There are four
sub menus under the Reports softkey:
Summary, Daily, Detail, and Code List.
*Management Add and remove materials, customers,
and source IDs and names.
More… For applications with more than three
defined softkeys, the More… key is
automatically assigned to the fourth
softkey position. Press More… to toggle
between groups of softkeys.
* Advance Truck Mode only
** 720i Batching Version software only
*** Truck Modes 1-6 only
Table 1-1. Configurable Softkeys

Introduction 5
1.4 System Configurations and Options
Table 1-2 lists the 720i system models and part
numbers. All models include CPU board with one
option card slot. The 720i is a single scale unit and
cannot be upgraded to a multi-channel A/D.
Option Cards
Table 1-3 lists the available 720i option cards. Most of
the listed option cards are installed in the expansion
card slot, J12. USB, Ethernet, and fiber-optic interface
cards are installed in connector J11.
Relay Options
Relay racks are available for all 720i systems. Relays
require an external enclosure for the relays. Consult
factory for details.
DC Power Supplies
Two DC power supplies are available for mobile 720i
applications:
PN 97474, 9–36 VDC supply
PN 99480, 10–60 VDC supply
Consult factory for more information.
1.5 Summary of Changes
Updates to this manual include the following:
Version 1.03
• MINNEG and MAXNEG parameters have
been added to the ALGOUT menu (see
Section 3.2.6 on page 45) to support tracking
of negative weight values.
•Added Section 9.0 on page 81 on ProAction
PCEE information.
• Added print token for Alibi Numbering <AN>.
Version 1.04
• Updated the analog menu.
•Added Section 8.0 on page 65 on Setpoints
(Version 2.00)
•Batching (
720i batching Version 1.00).
• Updated Alibi Tracking Section 11.12 on
page 110.
Version 2.00
• Added Advance Mode Section 7.6 on page 59.
• Updated FEATURE menu Figure 3-13 on
page 37 to include Advance Mode.
•Batching (
720i batching Version 1.01).
System Model Model PNs
Universal (tilt stand) model, 115/230 VAC
with PCE software
101230
Universal (tilt stand) model, 115/230 VAC,
European, CEE 7/7 power cord with PCE
software
103459
Panel mount model, 115/230 VAC (power
cord sold separately), with PCE software
101229
Universal (tilt stand) model, 115/230 VAC
with 720i Batch software
115447
Universal (tilt stand) model, 115/230 VAC,
European, CEE 7/7 power cord with 720i
Batch software
115448
Panel mount model, 115/230 VAC (power
cord sold separately), with 720i Batch
software
115449
Table 1-2. Part Numbers for 720i Models
Option Card PN
Single-channel analog output card 67602
Dual serial port expansion card 67604
24-channel digital I/O expansion card 67601
Ethernet communications card 71986
EtherNet/IP communications card 87803
DeviceNet interface card 68541
Allen-Bradley Remote I/O interface card 68539
Profibus DP interface card 68540
USB interface card 93245
Fiber-optic interface card 96736
Table 1-3. Part Numbers for 720i Option Cards

6720i Installation Manual
2.0 Installation
This section describes procedures for connecting load
cell, digital I/O, and serial communications cables to
the 720i indicator. Assembly drawings and replacement
parts lists for the universal model are included for the
service technician. See Section 11.13 on page 111 for
dimension drawings.
• Use a wrist strap to ground yourself and
protect components from electrostatic
discharge (ESD) when working inside the
indicator enclosure.
• This unit uses double pole/neutral fusing
which could create an electric shock hazard.
Procedures requiring work inside the indicator
must be performed by qualified service
personnel only.
• The supply cord serves as the power
disconnect for the 720i. The power outlet
supplying the indicator must be installed near
the unit and be easily accessible.
2.1 Unpacking and Assembly
Immediately after unpacking, visually inspect the 720i
to ensure all components are included and undamaged.
The shipping carton should contain the indicator, this
manual, and a parts kit. If any parts were damaged in
shipment, notify Rice Lake Weighing Systems and the
shipper immediately.
See Section 2.9 on page 11 for parts kit contents.
2.2 Enclosure Disassembly
The indicator enclosure must be opened to install
option cards and to connect cables for installed option
cards.
The 720i has no on/off switch. Before
opening the unit, ensure the power cord is
disconnected from the power outlet.
Ensure power to the indicator is disconnected, then
place the indicator face-down on an antistatic work
mat. Remove the screws that hold the backplate to the
enclosure body, then lift the backplate away from the
enclosure and set it aside.
2.3 Cable Connections
The universal model of the 720i provides six cord grips
for cabling into the indicator: one for the power cord,
five to accommodate other cabling. Install plugs in all
unused cord grips to prevent moisture from entering
the enclosure.
2.3.1 Cable Grounding
Except for the power cord, all cables routed through the
cord grips should be grounded against the indicator
enclosure. Do the following to ground shielded cables:
• Use the lock washers, clamps, and kep nuts
provided in the parts kit to install grounding
clamps on the enclosure studs adjacent to cord
grips. Install grounding clamps only for cord
grips that will be used; do not tighten nuts.
• Route cables through cord grips and grounding
clamps to determine cable lengths required to
reach cable connectors. Mark cables to remove
insulation and shield as described below:
• For cables with foil shielding, strip insulation
and foil from the cable half an inch (13 mm)
past the grounding clamp (see Figure 2-1).
Fold the foil shield back on the cable where the
cable passes through the clamp. Ensure silver
(conductive) side of foil is turned outward for
contact with the grounding clamp.
• For cables with braided shielding, strip cable
insulation and braided shield from a point just
past the grounding clamp. Strip another half
inch (13 mm) of insulation only to expose the
braid where the cable passes through the clamp
(see Figure 2-1).
Figure 2-1. Grounding Clamp Attachment for Foil-Shielded
and Braided Cabling
CAUTION
WARNING
Insulated cable
Foil (silver side out) Grounding clamp
Shield wire (cut) Length of foil before folding
back on cable insulation
Cut insulation here
for foil-shielded cables
Braid
Cut insulation here
for braided cables
NOTE: Install lockwashers
first, against backplate,
under grounding clamp

Installation 7
• For load cell cables, cut the shield wire just
past the grounding clamp. Shield wire function
is provided by contact between the cable shield
and the grounding clamp.
• Route stripped cables through cord grips and
clamps. Ensure shields contact grounding
clamps as shown in Figure 2-1. Tighten
grounding clamp nuts.
• Finish installation using cable ties to secure
cables inside of indicator enclosure.
2.3.2 Load Cells
To attach cable from a load cell or junction box to the
720i, route the cable through the cord grip and ground
the shield wire as described in Section 2.3.1 on page 6.
Next, remove load cell connector J1 from CPU board.
Wire the load cell cable from the load cell or junction
box to the connector as shown in Table 2-1.
Figure 2-2. Load Cell Connector
If using 6-wire load cell cable (with sense wires),
remove jumpers JP1 and JP2 before reinstalling
connector J1. For 4-wire installation, leave jumpers
JP1 and JP2 on.
When connections are complete, reinstall load cell
connector on the CPU board header and use two cable
ties to secure the load cell cable to the inside of the
enclosure.
2.3.3 Serial Communications
Communications ports on the 720i CPU board support
PS/2-type remote keyboard, full duplex RS-232, and
20 mA output communications at up to 115200 bps.
Optional communications cards support USB,
Ethernet, and fiber-optic connections to the 720i.
To attach serial communications cables, route the cable
through the cord grip and ground the shield wire as
described in Section 2.3.1 on page 6. Remove the serial
connector from the CPU board and wire to the
connector. Once cables are attached, plug the connector
into the header on the board. Use cable ties to secure
serial cables to the inside of the enclosure.
Table 2-2 shows the pin assignments for Ports 1, 2, and
4. Port 1 supports remote keyboard attachment of PS/
2-type personal computer keyboards (see Section 11.9
on page 109 for information about the PS/2 keyboard
interface.) Port 3 uses connector J4 to provide a
dedicated display port for both universal and panel
mount versions of the 720i.
Serial ports are configured using the SERIAL menu.
See Section 3.2.2 on page 33 for configuration
information.
J1 Connector Pin Function
1+SIG
2–SIG
3+SENSE
4–SENSE
5+EXC
6–EXC
• For 6-wire load cell connections, remove jumpers JP1
and JP2.
Table 2-1. Load Cell Connector Pin Assignments
J1 LOAD CELL CONNECTOR
+SIG
–SIG
+SENS
–SENS
+EXC
–EXC
Connector Pin Signal Port
J3 1CLK 1
2+5V
3GND
4DATA
J2 1GND 2
2RS-232 RxD
3RS-232 TxD
4RS-232 RTS
5RS-232 CTS
6GND
J4 1RS-422/485 Y 3
2RS-422/485 Z
3RS-422/485 B
4RS-422/485 A
5+6V
6GND
J5 1GND 4
2RS-232 RxD
3RS-232 TxD
420mA OUT
Table 2-2. Serial Port Pin Assignments

8720i Installation Manual
An optional dual-channel serial communications
expansion card, PN 67604, is also available. The serial
expansion card provides two additional serial ports,
assigned as port numbers 7 and 8. One port on the
serial expansion card supports four-wire RS-485
communications. Both ports on the expansion card can
support RS-232 or 20mA connections.
Installation of option cards in connector J11
requires removal of the PORT2/OPTI port
selection jumper (see Figure 2-3 on page 9).
Install the jumper to enable RS-232
communications through connector J2;
remove the jumper to enable an USB,
fiber-optic, or Ethernet option card installed in
connector J11.
See the communications interface card installation
instructions for more information.
2.3.4 Digital I/O
Digital inputs can be set to provide many indicator
functions, including all keypad functions. Digital
inputs are active low (0 VDC), inactive high (5 VDC).
Digital outputs are typically used to control relays that
drive other equipment. Outputs are designed to sink,
rather than source, switching current. Each output is a
normally open collector circuit, capable of sinking 24
mA when active. Digital outputs are wired to switch
relays when the digital output is active (low, 0 VDC)
with reference to a 5 VDC supply.
Table 2-3 shows the pin assignments for connector J6.
Digital inputs and outputs are configured using the
DIG I/O menu. See Section 3.2.5 on page 43 for
configuration information.
An optional 24-channel digital I/O expansion card, PN
67601, is available for applications requiring more
digital I/O channels.
A digital I/O point can be configured to count
active pulse inputs by setting the bit to INPUT
(DIG I/O menu) and using PCEE to monitor the
bit. However, the fastest pulse rate that can be
counted using a digital input is 10Hz (10 pulses
per second).
2.3.5 Detached Display Module (DDM)
Table 2-4 shows the connections between connector J4
on the 720i CPU board and connector J3 (Com 1) on
the detached display module (DDM) board. See board
diagrams in Figures 2-3 and 2-4, on page 9.
2.4 Installing Option Cards
Each option card is shipped with installation
instructions specific to that card. The general procedure
for all option cards is as follows:
Option cards are not hot-pluggable.
Disconnect power to the 720i before
installing option cards.
1. Disconnect power to the indicator. Remove
backplate as described in Section 2.2 on
page 6.
2. Carefully align the option card connector with
connector J12 or J11 on the CPU board (see
Figure 2-3 on page 9). Press down to seat the
option card in the CPU board connector.
3. Use the screws provided in the option kit to
secure the other end of the option card to the
threaded standoffs on the CPU board (see
Figure 2-3).
4. Make connections to the option card as
required. Use cable ties to secure loose cables
inside the enclosure. When installation is
complete, reassemble the enclosure as
described in Section 2.6 on page 10.
The 720i automatically recognizes all installed option
cards when the unit is powered on. No
hardware-specific configuration is required to identify
the newly installed card to the system.
J6 Pin J6 Signal
1+5 VDC
2GND
3DIO 1
4DIO 2
5DIO 3
6DIO 4
7DIO 5
8DIO 6
9DIO 7
10 DIO 8
Table 2-3. J6 Pin Assignments (Digital I/O)
Note
Note
DDM Com 1
J3 Connector
CPU Board
J4 Connector
Pin Signal Pin Signal
1 A 1 Y
2 B 2 Z
3 Z 3 B
4 Y 4 A
5+6V 5+6V
6GND 6GND
Table 2-4. CPU Board—DDM Connections
CAUTION

Installation 9
Figure 2-3. 720i CPU Board
Figure 2-4. 720i Display Board
J5
SERIAL PORT 4
J4
SERIAL PORT 3
DISPLAY
J3
SERIAL PORT 1
PS/2
J2
SERIAL PORT 2
J1
LOAD CELL CONNECTOR
BATTERY
LOAD CELL SENSE
JUMPERS
J6
DIGITAL I/O
J12
EXPANSION CARD SLOT
J11
COMMUNICATIONS
OPTION CARD SLOT
J9
SW1
JUMPER ON TO ENABLE J2,
OFF TO ENABLE J11
HEARTBEAT
LED
J10
POWER SUPPLY
CONNECTOR
J7
J8
COM 1 COM 0
CPU Interface Port Programming Port

10 720i Installation Manual
2.5 Slot Assignments
Table 2-5 lists the slot numbers, CPU board connectors, and configuration assignments made for both onboard and
expansion card functions in the 720i. See Figure 2-3 for connector locations.
2.6 Enclosure Reassembly
Once cabling is complete, position the backplate over
the enclosure and reinstall the backplate screws. Use
the torque pattern shown in Figure 2-5 to prevent
distorting the backplate gasket. Torque screws to 15
in-lb (1.7 N-m).
Figure 2-5. 720i Enclosure Backplate
Torqued screws may become less tight as
the gasket is compressed during torque
pattern, therefore a second torque is
required using the same pattern and
torque value.
2.7 CPU Board Removal
If you must remove the 720i CPU board, use the
following procedure:
1. Disconnect power to the indicator. Remove
backplate as described in Section 2.2 on
page 6.
2. Unplug connectors for power to the board,
serial communications, digital I/O, and any
installed option cards.
3. Remove any installed option cards.
4. Remove the five phillips head screws and the
kep nut from the CPU board.
5. Remove CPU board from the enclosure. If
necessary, cut cable ties to shift cables out of
the way.
To replace the CPU board, reverse the above
procedure. Be sure to reinstall cable ties to secure all
cables inside the indicator enclosure.
Slot Number Connector Function Configured As
0Connector J6 Onboard digital I/O Slot 0, bits 1–8
Connectors J3, J2, J5 Onboard serial communications Ports 1, 2, 4
1Connector J1 Onboard single-channel A/D Channel 1
2Connectors J12 (expansion card
slot) and J11(communications
option card slot)
Dual-channel serial expansion card Ports 7–8
Digital I/O expansion card Slot 2, bits 1–24
Analog output card Analog 2
Bus communications cards Bus Option 2
Table 2-5. 720i Slot Assignments
1
23
4
5
6
7
8
9
1011
12
Torque backplate screws
to 15 in-lb (1.7 N-m)
Important

Installation 11
2.8 Battery Replacement
The lithium battery on the CPU board maintains the
real-time clock and protects data stored in the system
RAM when the indicator is not connected to AC power.
Data protected by the CPU board battery includes time
and date, truck and tare memory, and onboard database
information.
Use Revolution III™ to store a copy of the indicator
configuration on a PC before attempting battery
replacement. If any data is lost, the indicator
configuration can be restored from the PC.
Watch for the low battery warning on the LCD display
and periodically check the battery voltage on both the
CPU board and on any installed memory option cards.
Batteries should be replaced when the indicator low
battery warning comes on, or when battery voltage falls
to 2.2 VDC. Life expectancy of the battery is ten years.
Replacement Procedure
For best results, replace the battery while in weigh
mode and with AC power applied. Use care not to
bend the battery retaining spring.
If the battery must be replaced with power removed, do
the following immediately after restoring power:
1. Place indicator in setup mode.
2. Go to the Version menu and press the RSConfig
softkey. If connected using Revolution III,
configuration can be reset by using monitor
mode to enter the RESETCONFIGURATION
command followed by the RS command.
See Figure 2-3 on page 9 for CPU board battery
location and orientation (positive side up).
Risk of explosion if battery is replaced
with incorrect type. Dispose of batteries
per manufacturer instruction.
2.9 Replacement Parts and Assembly Drawings
2.9.1 Universal Model
Table 2-6 lists replacement parts and parts kit contents for the 720i universal enclosure model, including all parts
referenced in Figures 2-6 through 2-8.
WARNING
Ref Number PN Description (Quantity) See Figure
1101257 Switch panel membrane, universal (1) 2-6
253308 Model/serial number label (1)
3101263 Enclosure, universal (1)
4103988 Tilt stand washers (2), in parts kit
5103610 Tilt stand knobs (2), in parts kit
667531 Tilt stand (1)
715628 Cord grip, 1/2 NPT (1)
815626 Cord grips, PG9 (3)
915630 Lock nut for 1/2 NPT cord grip (1)
10 68600 Cord grip, PG11 (1)
11 15627 Lock nuts, PCN9 (3)
12 68601 Lock nut, PG11 (1)
13 45043 Ground wire, 4 in w/ No. 8 eye connector (1)
14 102887 Display board assembly, universal (1) 2-7
15 85202 Power cord assembly, 115 VAC and 230 VAC North American units (1) 2-6
85203 Power cord assembly, 230 VAC European units (1) —
16 67885 Standoffs, M-F, 4-40NC x 3/4 (2) 2-7
17 14618 Kep nuts, 4-40NC hex (3)
18 103443 CPU board mounting strip (1)
19 106788 720i CPU board (PCE Version) (1)
20 102376 Backplate gasket, universal (1) 2-7
21 75062 Sealing washers (4)*
22 14862 Machine screws, 8-32NC x 3/8 (4)*
Table 2-6. Universal Model Replacement Parts

12 720i Installation Manual
23 14626 Kep nuts, 8-32NC (7)* 2-8
24 53307 Label (1) 2-7
25 69291 3V Lithium coin battery
26 103989 Standoffs, F-F, 4-40 x 1.06 (3)
27 14825 Machine screws, 4-40NC x 1/4 (18)
28 102888 LCD display module, 240x64, universal (1)
29 16861 High voltage warning label (1)
30 67796 Power supply cable assembly, to CPU board (1)
31 67613 Power supply, ±6VDC, 25W (1)
32 103442 Power supply bracket (1)
33 103936 Component plate (1) 2-6
35 16892 Ground/Earth label (1) 2-8
36 15134 Lock washers, No. 8, Type A (3)
37 30376 Nylon seal ring for 1/2 NPT cord grip (1) 2-6
38 30375 Nylon seal rings for PG9 cord grips (3)
39 68599 Nylon seal ring for PG11 cord grip (1)
40 102377 Enclosure backplate, universal (1) 2-7
—103458 Ribbon cable assembly, 7 in, 20-pin female, universal (1) —
—103609 Cable assembly, CPU-to-display, universal (1) —
* Additional parts included in parts kit.
Universal Model Parts Kit Contents
104033 720i Software Tool Kit CD (1)
103988 Tilt stand washers (2)
103610 Tilt stand knobs (2)
42149 Rubber feet for tilt stand (4)
30623 Machine screws, 8-32NC x 7/16 (3)
14626 Kep nuts, 8-32NC (4)
14862 Machine screws, 8-32NC x 3/8 (5)
15134 Lock washers, No. 8, Type A (4)
15631 Cable ties (5)
15665 Reducing gland for 1/2 NPT cord grip (1)
19538 Cord grip plugs (4)
53075 Cable shield ground clamps (4)
75062 Sealing washers (8)
71344 10-position screw terminal for J6 (1)
76513 4-position screw terminals for J3 and J5 (2)
76514 6-position screw terminals for J1, J2 and J4 (3)
94422 Capacity label (1)
Ref Number PN Description (Quantity) See Figure
Table 2-6. Universal Model Replacement Parts (Continued)

Installation 13
Figure 2-6. 720i Universal Model Assembly, Enclosure and Tilt Stand
33
13
12
11
9
39
10 38
837
7
15
3
4
5
6
2
1

14 720i Installation Manual
Figure 2-7. 720i Universal Model, CPU Board and Backplate
Figure 2-8. 720i Universal Model, Grounding Detail
25 26
27 28 29
30 31 32
14
16
18
17
19
40
24
21
22
20
From Power Supply
Ground wire (13)
to backplate (22)
36
23
35
Ground wire from
power cord (15)
Grounding Stack